class MeioTransporte:
	def __init__(self, combustivel="gasolina"):
		self.combustivel = combustivel
	def __str__(self): return " combustivel = " + str(self.combustivel)
class Carro(MeioTransporte):
	def __init__(self, combustivel):
		MeioTransporte.__init__(self, combustivel)
	def __str__(self):
		return MeioTransporte.__str__(self)
obj = Carro("gasoleo")
print isinstance(obj, MeioTransporte)
print issubclass(Carro, MeioTransporte)
try:
	print obj.__privado
except AttributeError:
	print "__privado e uma variavel privada"
